My springer spaniel puppies are 6 days old. Although they have not opened their eyes yet (too young) I noticed that one of them has quite a swollen eye. It does not look injured in any way and the new mother is very gentle. The pup does not seem to be in any distress and is eating and sleeping well. There is no discharge from the eye. I wonder if I should try antibiotic cream on the lid? I will bring it to the vet in 24 hours if it isn't going down on its own. Any idea why the eye would be swollen, an insect bite maybe?